What's the best pump to run in a 2010 return less sys ?
will the 340 be enough ? going to a LSA in the spring.
boost 8-10 psi. only. 10.5 comp.

 

How much power do you intend on making? Can you run a flex-fuel pump?

 

there's no flex fuel options for a Colorado.
so there's not one from GM. Only looking
for about 500-550 HP. I have plenty of pump
for my 6.2 now. it holds 56psi. at 7000rpm
My eng is a flex from a 2011 Silverado.